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Healthy puppies, in normal weight, born in normal sized litters are usually half their mature weight at 3 months of age for girls (14 weeks or so) and 16 or 17 weeks of age for boys. If your puppy was born in a normal sized litter (3-5 puppies), was a normal size at birth, is not fat or thin right now, has always been healthy and is 7.4 lbs. at 15 weeks--she will likely mature out at about 15-16 lbs.

If the litter size was less than 3 puppies she will grow faster at first and be larger at this stage than normal. If the litter size was more than 5 puppies she will probably grow a bit slower at first and be smaller at this stage than normal. I don't see her as being large at this point in time. Spaying before the growth plates close will almost certainly cause her to be at least an inch taller and a bit heavier at maturity. [Aim to spay 1/2 way between first and second seasons, so 3 months after first season]

Note: Parental size has less to do with puppy size than 'family size'. In other words if the parents were the smallest in their respective litters they are highly likely to produce puppies more the size of most of the members of their family--or larger than they themselves are. You really can't go by the size of the parents much for this reason.

Parent weights are not always a very precise guide to adult weights for offspring -- generally you want to see what all four grandparents weighed.

Thanks to Laura Lang, an Ohio breeder, and Karlin, board owner, for the above.

Probably closer to 17ish pounds for a male given those weights, I should think-- 14 would be very small for a male generally. But your best guide is really how big both parents and grandparents were -- an average of those. All of this is only averages and guesswork -- you would likely have an adult of at least 15-16lbs I should think, but could easily end up with one 20lbs... really depends on so many factors!